Rolled metal section



A. L..ROBERTS.

ROLLED METAL SECTION. APPLICATION HLED NOV. 25,1919- Patented Oct. 4,1921.

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V ROLLED METAL SECTION.

Specification of Letters Patent.

Patented. Oct. 4', 1921.

Application filed November 25, 1819. Serial No. 340,576.

To all whom it may concern Be it known that I, ALVIN L. Ronnnrs, acitizen of the-United States, and a resident of Philadelphia, in thecounty of Philadelthe length of the same and designed to stiflen thesection, so that when two or more sections are united to form a hollowcolumn or reinforcement, the hollow columns so formed will be ofpractically equal strength in all directions, so as to withstand anybending stress that may be applied.

The accompanying drawing is a View in transverse section of a columnadapted as a reinforce for a concrete column, one half being shown infull lines and the other half in dotted lines.

In the construction shown, each section5 is semi-cylindrical in shape,with integral stiffening ribs 6 spaced equally around the outercircumference of the section, the said ribs extending longitudinallythroughout the length of the side. Each section is provided at its freeedge with a rib or flange 6 of less thickness than the intermediateribs, and having flat outer faces so that when two sections are unitedto form a hollow column as shown, the end ribs or flanges on the twosections will come together and bear against each other throughout theirentire areas. Each e'nd flange is provided with rivet holes for thepassage of the rivets 7 which secure the two semi-cylindrical sectionstogether thus forming a cylinder having equally spaced externallongitudinal ribs located on radial lines-from the center of thesection. A. column thus formed is symmetrical and of practically equalstrength in all directions and is adapted to withstand any bendingstress which may be applied.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent, is

A rolled column section concave on one face and convex on the other, andprovided on its convex face with integral longitudinal equally spacedstiffening ribs which are deep in proportion to their width all of whichare of approximately the same size and also provided at each ofits edgeswith a side flange of less thickness than the intermediate ribs andhaving flat outer faces to engage similar faces on its companion sectionto which it is riveted.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

' ALVIN L. ROBERTS. IVitnesses:

GEORGE MARX, C. C. HARDING.

